Shared Flashcard Set

Details

Chapter 16
Darwin's Theory
15
Biology
9th Grade
01/22/2015

Additional Biology Flashcards

 


 

Cards

Term
evolution
Definition
the process of change over time
Term
fossil
Definition
preserved remains or traces of ancient organisms
Term
artificial selection
Definition
nature provides the variations, and humans select those they find useful.
Term
Lamarck's Evolutionary Hypothesis
Definition
was incorrect in several ways, but paved a way for later biologists.
Term
Thomas Malthus
Definition
reasoned that if the human population grew unchecked, there wouldn't be enough living space and food for everyone.
Term
adaptation
Definition
any inheritable characteristic that increases an organisms ability to survive & reproduce in its environment.
Term
fitness
Definition
describes how well an organism can survive and reproduce in it's environment.
Term
natural selection
Definition
is the process by which organisms with variations most suited to their local environment and leave more offspring.
Term
principle of Common Descent
Definition
all species, living and extinct, are descended from ancient common ancestors
Term
biogeography
Definition
is the study of where organisms live now and where they and their ancestors lived in the past.
Term
homologous structures
Definition
structures that are shared by related species and that have been inherited from a common ancestor
Term
analogous structures
Definition
body parts that share common function, but not structure Ex: wing of a bee and wing of a bird
Term
vestigial structures
Definition
inherited from ancestors but have lost much or all of their original function due to different selection pressures acting on the descendant
Term
Hox genes
Definition
ancient gene that determines body parts
Term
Darwin's conclusion
Definition
living organisms evolved through descent with modification from a common ancestor
Supporting users have an ad free experience!